I would leave the food and water down and be sure to keep checking for symptoms of hypoglycemia in one so young and little. These little guys don't have a lot of reserves and can go down quickly and totally should they run low on fluids, glucose, etc., even at night.
Welcome to YT and congratulations on the new Yorkie.
__________________  Jeanie and Tibbe One must do the best one can. You may get some marks for a very imperfect answer: you will certainly get none for leaving the question alone. C. S. Lewis |